RFR (XS): CR 8004330: Add missing Unsafe entry points for addAndGet() family

[Vladimir Kozlov]

Hi Alan,

Can we push it through our hotspot-main/jdk repo? I will send formal 
review into open today. Should I use core-libs-dev list for that?

https://jbs.oracle.com/bugs/browse/JDK-8004330
http://shipilev.net/pub/jdk/hotspot/unsafe-getandadd/webrev-1/

As Aleksey pointed it is java side for Hotspot intrinsics we added some 
time ago:

https://jbs.oracle.com/bugs/browse/JDK-7023898
http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/7eca5de9e0b6

Thanks,
Vladimir

On 12/20/12 5:08 AM, Aleksey Shipilev wrote:
> Vladimir, Christian, Roland, anyone, can you please sponsor this trivial
> change?
>
> -Aleksey.
>
> On 12/05/2012 03:34 PM, Aleksey Shipilev wrote:
>> Friendly reminder to check this didn't fall into the trenches.
>>
>> -Aleksey.
>>
>> On 12/04/2012 02:42 AM, Aleksey Shipilev wrote:
>>> (I should have CC'ed Doug on this, doing now).
>>>
>>> -Aleksey.
>>>
>>> On 12/04/2012 02:36 AM, Aleksey Shipilev wrote:
>>>> (again, submitting on behalf of Doug Lea)
>>>>
>>>> Hi,
>>>>
>>>> This simple change is missing from recently committed CR 7023898. While
>>>> the VM support is there in Hotspot, no methods are exposed in Unsafe to
>>>> actually make use of those intrinsics. This is the webrev fixing that:
>>>>    http://shipilev.net/pub/jdk/hotspot/unsafe-getandadd/webrev-1/
>>>>
>>>> Testing:
>>>>    - Built and tested in Linux x86_64
>>>>    - Doug had provided the AtomicIntegerV8 [1] version making use of this
>>>> new code, extensively tested on his platforms
>>>>    - java-concurrency-torture [2] atomicity tests [3] are passed for
>>>> AtomicIntegerV8 on my and Doug's platforms
>>>>    - no other testing is expected for this trivial change.
>>>>
>>>> I would need a sponsor to push this change.
>>>>
>>>> Thanks,
>>>> Aleksey.
>>>>
>>>> [1]
>>>> https://github.com/shipilev/java-concurrency-torture/blob/master/src/main/java/java/util/concurrent/atomic/AtomicIntegerV8.java
>>>> [2] https://github.com/shipilev/java-concurrency-torture/
>>>> [3]
>>>> https://github.com/shipilev/java-concurrency-torture/blob/master/src/main/java/org/openjdk/concurrent/torture/tests/atomics/integer/AtomicIntegerV8PairwiseTests.java
>>>>
>>>
>